I have found a 14 bolt dually rear, and a 60 dually front. I have read that I can bolt these axles under my suburban and if I run Hummer wheels everything fits under the sheet metal. Is this correct? Are there any tips or tricks that I should know? I am also interested in running 19.5" rims but I only have limited information about this. Is the bolt pattern the same (8 lug) ? Will the tires fit under the sheet metal? What tires are available out there if I go this direction? Thanks in advance for all the information.